In order to improve the beam stability and decrease the electron refilling time from booster to storage ring, Synchrotron Light Research Institute (SLRI) have planned to upgrade the booster synchrotron for providing full energy injection into storage ring at 1.2 GeV beam energy. After replacing booster bending magnet power supply (Y-BM-PS), De-focusing quadupole power supply (Y-QD-PS) and Bending magnet power supply at the transfer line (H-BH-PS), the full energy injection have been tested. It was done in the machine study time in 1-5 October and 1-5 November, 2015. In this report, the useful parameters, the commissioning procedure and the preliminary result will be summarized.